Study on Critical Points of Volume Holograms Recording with Angular Multiplexing Technique for Particle Field
|School||Chinese Academy of Engineering Physics|
|Keywords||particle field volume holography angular multiplexing|
Since holography for hypervelocity particle field has superiority of high resolution,3D observation and so on, it is especially useful for studying intensive dynamic loaded ejecta, interfacial instability, etc. However, the limitation comes from performance of laser, holography plate and so on, at present, makes only1-2frames hologram recorded. Study multi-frame holography for hypervelocity particle field thus is significant in science and valuable in application. For the purpose of using volume holography in hypervelocity particle field record, the dissertation theoretically and experimentally studies some critical points.I. After review development of particle field holography, volume holography and multi frame holography in some other domain, the purpose and significance of this study is elaborated;II. Based on classical theory, coupled-wave theory, the differential equation set which considering shift of each2D volume grating is derived, and the reliability of it is proved from typical case calculation;III. In order to understand the influence from record material, some properties such as thickness, uniformity, resolution, absorption and shrinkage are studied. The results can give some useful advises for holographic material producing or option;IV. The light path, exposure energy, coherence, far field condition, energy ratio between reference and object light are studied, and some results that contribute to experiment design and optimization are obtained;V. On the basis of deriving equation set, the paper presents a method for visual simulating angular multiplexing volume holograms recording and reconstruction. The SNR of reconstructed page is employed to analyze influence from angular deviation and diffraction efficiency equality;VI. Angular multiplexing hologram with four frames, each of which records different particle graph, is achieved bases on appropriately choose record material and design experimental scheme.